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3 years ago

DISCLAIMER: THERE ARE MANY QUESTIONS LIKE THIS ONE, SO MAKE SURE THAT YOU ARE ANSWERING THIS SPECIFIC QUESTION.

Mathematics

1 answer:

lakkis [162]3 years ago

7 0

Answer:

A. 71% (±18%)

Step-by-step explanation:

Based on the confidence interval relation :

Mean ± Margin of error

The mean could be any given value :

However, the margin of error at a given confis nce level will will affected by the sample size, larger sample sizes will result in smaller margin of error values as the it will result in a large value denominator hence giving a small margin if error value when divided.

Margin of Error = Zcritical * σ/√n

Since.weve been told that the sample size is small, this will result in a large error margin value, from the options given, the value with the largest error margin value will be produced by the smallest samole size. Hence the option with the largest error margin value is ; ±18%

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A french fry stand at the fair serves their fries in paper cones. The cones have a radius of 22 inches and a height of 66 inches

icang [17]

Answer:

The height of the new cones will be 16.5 inches.

Step-by-step explanation:

We know that,

The volume of a cone is,

$V=\frac{1}{3}\pi r^2 h$

Where, r is the radius of the cone,

h is the height of the cone,

In the original cone,

r = 22 inches,

h = 66 inches,

Thus, the volume would be,

$V_1=\frac{1}{3}\pi (22)^2(66)$

Also, for the new cone,

r = 44 inches,

Let H be the height,

So, the volume of the new cone would be,

$V_2=\frac{1}{3}\pi (44)^2(H)$

According to the question,

$V_2=V_1$

$\implies \frac{1}{3}\pi (44)^2(H)=\frac{1}{3}\pi (22)^2(66)$

$\implies H=\frac{22^2(66)}{44^2}=(\frac{22}{44})^2\times 66 = \frac{66}{4}=16.5$

Hence, the height of the new cones will be 16.5 inches.

7 0

3 years ago

Cinco amigos van al cine. La entrada cuesta 4,50$ dos no tienen dinero y los otros tres deciden invitarles ¿Cuanto dinero tiene

Dmitry_Shevchenko [17]

Answer:

Costo unitario= $3

Step-by-step explanation:

Dada la siguiente información:

Entrada= $4.5

Cantidad de entradas de más= 2

Cantidad de amigos que pagan= 3

Primero debemos calcular el total a pagas de más:

Total a pagar de más= 2*4.5= $9

Ahora, cuánto debe pagar cada uno:

Costo unitario= costo total / cantidad de personas

Costo unitario= 9/3

Costo unitario= $3

6 0

3 years ago

How do you solve this

PilotLPTM [1.2K]

Since 3=30/10, (30+1)/10=31/10. 31s/10=(30+1)/5 ( we get 30 because 5*6=30) = 31/5. Multiplying both sides by 10, we get 31s=62 (since 5 is a factor of 10, we can do 10/5 =2 and multiply 2 by 31). Dividing both sides by 31, we get s =2

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3 years ago

Find x Secant tangent angles Helpppp

valentinak56 [21]

Answer:

x = 139

Step by Step Explanation:

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3 years ago

10) Isosceles trapezoid ABCD has legs AB and CD and base BC. If AB = =

Tju [1.3M]

Answer:

y=14

Step-by-step explanation:

We are told that the legs of the isosceles trapezoid are AB and CD

AB = 7y - 4

CD = 8y - 18

In any isosceles trapezoid, the two legs are of equal length.

Therefore, AB = CD

⇒ 7y - 4 = 8y - 18

Add 18 to both sides of the equation

7y - 4 + 18 = 8y - 18 + 18

7y + 14 = 8y

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3 years ago